一个学生成绩管理程序,实现以下功能：

（1）用户录入每个学生每门课程的分数。

（2）能够计算每个学生的平均分，并能按平均成绩排序，显示每个学生的平均分和排名。

（3）能够显示成绩列表。

（4）能够按学号排序。

（5）能按学号查找，删除学生的信息。

（6）将成绩数据存入文件。

（7）将成绩数据从文件读出。

-A student grade management procedures, to achieve the following functions:

(1) the user input every student score for each course.

(2) to calculate the average, each of the students and be able to sort by grade point average, according to each student s score and ranking.

(3) list to display results.

(4) to be able to sort by student number.

(5) will be effected according to the student number search, delete student information.

(6) will result data stored in the file.

(7) will score data read from the file.